I saw Toby Buckland mention the 'Chelsea Chop' on GW last Friday; I've
not heard of it before.

I think he said to cut back perennials to about half their height.

I have some foxgloves that look about the right height, but are these
perennials please? And, if they are, would they still be candidates for
the 'chop' if they already have flowers forming at the tops of the stems?

I'm a bit reluctant to chop off the forming flowers if none are going to
replace them.

Thanks in advance,
Meehan Mydog
Cheshire, UK